package com.bbs.server;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;

import com.alibaba.fastjson.JSON;
import com.bbs.beans.Subject;
import com.bbs.beans.Submit;
import com.bbs.server.AllSubject.Download;


import manager.PersistentManager;

/**
 * 通过主题获取所有的帖子
 * Servlet implementation class GetSubmitBySubject
 */
// @WebServlet("/GetSubmitBySubject")
public class GetSubmitBySubject extends HttpServlet {
	private static final long serialVersionUID = 1L;

	/**
	 * @see HttpServlet#HttpServlet()
	 */
	public GetSubmitBySubject() {
		super();
	}

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
	 *      response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		// response.getWriter().append("Served at:
		// ").append(request.getContextPath());
		request.setCharacterEncoding("UTF-8");
		response.setCharacterEncoding("UTF-8");

		String data = request.getParameter("data");
		//Upload upload = JSON.parseObject(data, Upload.class);
        Upload upload=new Upload();
        upload.setSubjectId(Long.parseLong(data));
		SessionFactory sf = PersistentManager.sharemanager().getSessionFactory();
		Session session = sf.openSession();

		Download download = new Download();

		Transaction tx = session.beginTransaction();

		try {
			Query q = session.createQuery("from Submit s where s.subject = ? order by s.time desc");
			Subject subject = new Subject();
			subject.setId(upload.getSubjectId());
			q.setParameter(0, subject);
			q.setFirstResult(0);
			q.setMaxResults(10);//前10条

			download.setSubmits(q.list());
			tx.commit();
			download.setStatus(DownloadInfo.SUCCESS);
		} catch (Exception e) {
			download.setStatus(DownloadInfo.FAILED);
			tx.rollback();
			e.printStackTrace();
		} finally {
			session.close();
		}

		System.out.println(JSON.toJSONString(download));
		response.getWriter().append(JSON.toJSONString(download));

	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
	 *      response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doGet(request, response);
	}

	// 上行数据
	public static class Upload {
		Long subjectId;

		public Long getSubjectId() {
			return subjectId;
		}

		public void setSubjectId(Long subjectId) {
			this.subjectId = subjectId;
		}

	}

	// 下行数据
	public static class Download {
		// 状态
		int status;
		// 主题
		List<Submit> submits = new ArrayList<>();

		public int getStatus() {
			return status;
		}

		public void setStatus(int status) {
			this.status = status;
		}

		public List<Submit> getSubmits() {
			return submits;
		}

		public void setSubmits(List<Submit> submits) {
			this.submits = submits;
		}

	}

}
